Page 1 of 3 123 LastLast
  1. #1
    looking at replacing the 25 year old steppers in my cnc with hybrid servo/steppers.I know leadshine are generally popular, ive seen these ones on ebay. any model better than others, anything to watch out for?all thoughts welcomethere used to be lots for sale on ebay, but mainly seems to be leadshine drivers at the moment, not many servoshttp://www.ebay.co.uk/itm/CNC-Leadshine-Closed-Loop-Hybrid-Servo-Drive-Kit-HBS57-Driver-Motor-encoder-/251942156746?hash=item3aa8ec39ca:g:EiAAAOxydlFSutQ h

  2. #2
    JAZZCNC's Avatar
    Lives in wakefield, United Kingdom. Last Activity: 16 Hours Ago Forum Superstar, has done so much to help others, they deserve a medal. Has been a member for 5-6 years. Has a total post count of 5,859. Received thanks 910 times, giving thanks to others 37 times.
    Can I ask Why you want to change.?

    I've used this setup and while they work very well the only reason I'd use them over standard stepper is because the motors are 3 phase motors which give much smoother operation and stronger thru out the rpm curve compared to 2 phase steppers. The actual Closed loop isn't that important or needed if normal steppers are sized and tuned correctly.

    Normal 2 phase steppers matched to decent digital drives like leadshine DM, EM or AM drives give great performance and reliabilty for the money. You'll get DM556 and 2 or 3nm Motor for around half the cost of the C-loop and if run with around 44v they'll work great. If the gap was closer on price I'd say go C-loop for 3 phase motors but unfortunatly it's not.

    Also if looking at the Larger C-loop motors then I'd look towards servos because most are just normal 2 phase steppers which offer no advantage other than the C-loop over normal steppers.

  3. #3
    I have a denford triac with original stepper setup, so standard nema34 steppers, controlled via digiplan drivers, connected to a pmdx26 via a home made 5v to 24v board.

    so I don't have micro stepping, which I would like. my current max speed is 1200mm/m which is pretty slow.

    so I want to increase steps and speed up

    two of the stepper motors are 25 years old

  4. #4
    JAZZCNC's Avatar
    Lives in wakefield, United Kingdom. Last Activity: 16 Hours Ago Forum Superstar, has done so much to help others, they deserve a medal. Has been a member for 5-6 years. Has a total post count of 5,859. Received thanks 910 times, giving thanks to others 37 times.
    Quote Originally Posted by andy_con View Post
    I have a denford triac with original stepper setup, so standard nema34 steppers, controlled via digiplan drivers, connected to a pmdx26 via a home made 5v to 24v board.

    so I don't have micro stepping, which I would like. my current max speed is 1200mm/m which is pretty slow.

    so I want to increase steps and speed up

    two of the stepper motors are 25 years old
    Well in that case I'd give C-loop a miss because pretty sure all the 34 motors are 2 phase motors. Those you linked to are Nema 23 and only 2nm.

    If you buy Am882 drives for around 50-60 each and fit motors below and run them around 70Vdc you'll transform the machine. In fact just the drives alone and some more voltage will make big difference.

    https://www.cnc4you.co.uk/Stepper-Mo...4808-02-Nema34

  5. #5
    thanks for the link

    have you ever used the leadshine hybrid servo to compare agains standard steppers?

  6. #6
    JAZZCNC's Avatar
    Lives in wakefield, United Kingdom. Last Activity: 16 Hours Ago Forum Superstar, has done so much to help others, they deserve a medal. Has been a member for 5-6 years. Has a total post count of 5,859. Received thanks 910 times, giving thanks to others 37 times.
    Quote Originally Posted by andy_con View Post
    thanks for the link

    have you ever used the leadshine hybrid servo to compare agains standard steppers?
    Yes and like I say the 3 phase motors are noticebly smoother and hold torque higher up the speed curve. But the larger 2 phase motors work just like normal steppers to me but with closed loop feedback to drive. Good digital drives and normal 2 phase steppers give the same performance to me.
    Last edited by JAZZCNC; 23-02-2016 at 11:39 PM.

  7. #7
    So why are the leadshine so expensive? Are they well made and good quality? Very reliable?

    On a nema34 frame size, if money was no object what's the best setup you could buy?

    I like to aim high in life and then work down from there ;-)

  8. #8
    JAZZCNC's Avatar
    Lives in wakefield, United Kingdom. Last Activity: 16 Hours Ago Forum Superstar, has done so much to help others, they deserve a medal. Has been a member for 5-6 years. Has a total post count of 5,859. Received thanks 910 times, giving thanks to others 37 times.
    Quote Originally Posted by andy_con View Post
    So why are the leadshine so expensive? Are they well made and good quality? Very reliable?
    If your meaning Leadshine closed loop then your paying for the encoder and novelty of closed loop. The AM882 are Leadshine drives and they are not expensive. Quality wise they are very well made and reliable. The software technology is well proven and tested. Most of the cheap chinese drives you see are rippoff's of leadshine technology.

    Quote Originally Posted by andy_con View Post
    On a nema34 frame size, if money was no object what's the best setup you could buy?

    I like to aim high in life and then work down from there ;-)
    Me I'd buy AC Servo's if money wasn't concern. Or maybe these, not tried any yet but heard good things about them.

    http://www.teknic.com/products/clear...-servo-motors/

  9. #9
    Quote Originally Posted by JAZZCNC View Post
    Or maybe these, not tried any yet but heard good things about them.

    http://www.teknic.com/products/clear...-servo-motors/
    Do you know how to see the Clear Path SD stepper killer models with prices? I registered there but it constantly loops me from publicity to publicity. Some geek made that web

    PS: I found it. It was : "Help me choose a motor.." then down bellow small button "skip and show all models"


    I looked around, while they may seem right for Americans, i doubt their value for us. The "stepper killer" seems not a true servo but a closed loop stepper motor, judging from torque at speeds, prices from >300$, then the true servos are from >600$ . For that money one could buy a brand new Brand servo motor +controller.



    For ~700$ i could tell you where to buy 4 servos/200w or 400w/ and motors together, though i did not have time to buy and test them. China of course. Seems though people use them re branded and pay greater prices for them.
    Last edited by Boyan Silyavski; 24-02-2016 at 07:18 AM.
    project 1 , 2, Dust Shoe ...

  10. #10
    JAZZCNC's Avatar
    Lives in wakefield, United Kingdom. Last Activity: 16 Hours Ago Forum Superstar, has done so much to help others, they deserve a medal. Has been a member for 5-6 years. Has a total post count of 5,859. Received thanks 910 times, giving thanks to others 37 times.
    Quote Originally Posted by Boyan Silyavski View Post
    I looked around, while they may seem right for Americans, i doubt their value for us. The "stepper killer" seems not a true servo but a closed loop stepper motor, judging from torque at speeds, prices from >300$,
    No they are proper DC servo motor and light years better than stepper system. Plus the question was if money wasn't a concern.
    You can't possibly compare them to cheap chinese servos because the quality of these would be like comparing to high end Yaskawa or Mitsubishi. It Would be like comparing Apples with oranges.!!

    Quote Originally Posted by Boyan Silyavski View Post
    For ~700$ i could tell you where to buy 4 servos/200w or 400w/ and motors together.
    But coming back into our world in budget terms then please do because at 175 for set of 400w motor/drive and I presume cables then thats good price.

    Edit:

    Forgot to say you can't buy Clearpath direct from Technik they route you thru distributor which did contact me but I didn't persue it any further.
    Last edited by JAZZCNC; 24-02-2016 at 09:02 AM.

Page 1 of 3 123 LastLast

Similar Threads

  1. Where I can buy Leadshine DCS 303
    By uli12us in forum Marketplace Discussion
    Replies: 5
    Last Post: 16-11-2015, 04:34 PM
  2. eBay: SEM SERVO MOTOR SEM MT30 U4-48, LAMBDA psu,s, 160v servo drive
    By deisel in forum Items On eBay UK
    Replies: 0
    Last Post: 29-01-2015, 08:55 AM
  3. Leadshine Drives Cheap
    By smeg up in forum Marketplace Discussion
    Replies: 12
    Last Post: 20-01-2015, 03:04 AM
  4. Leadshine website and AM882
    By EddyCurrent in forum General Electronics
    Replies: 7
    Last Post: 01-10-2013, 08:18 PM
  5. 400W servo - Leadshine ACS806 + ACM604V60 driver - PSU size?
    By dsc in forum Stepper & Servo Motors
    Replies: 10
    Last Post: 23-04-2013, 05:33 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •